The EV3 Large Servo Motor is a powerful motor that uses tacho feedback for precise control to within one degree of accuracy. By using the built-in rotation sensor, the intelligent motor can be made to align with other motors on the robot so that it can drive in a straight line at the same speed. It can also be used to give an accurate reading for experiments. The motor case design also makes it easy to assemble gear trains. - Tacho feedback to one degree of accuracy - 160-170 RPM - Running torque of 20 N/cm (approximately 30 oz/in) - Stall torque of 40 N/cm (approximately 60 oz/in) - Auto-ID is built into the EV3 software